Inventor
FUJISAWA KIYOSHI
JP16 patents
⚠️ This page may combine multiple inventors who share the name “FUJISAWA KIYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL CO
10 patentsUS6048054AApr 11, 2000
Ink replenishing apparatus and ink replenishing method for ink-jet printing ink cartridge
MITSUBISHI PENCIL CO16 citations82
USD1045374SOct 8, 2024
Case for mechanical pencil leads
MITSUBISHI PENCIL CO0 citations61
US12545047B2Feb 10, 2026
Writing instrument part, method for manufacturing writing instrument part, and writing instrument
MITSUBISHI PENCIL CO0 citations60
US7303351B2Dec 4, 2007
Writing instrument and welding method of writing point assembly and writing instrument parts connecting structure and connecting method
MITSUBISHI PENCIL CO2 citations57
US7325992B2Feb 5, 2008
Gas-pressurized writing instrument and writing instrument refill
MITSUBISHI PENCIL CO0 citations51
US7951504B2May 31, 2011
Fuel cartridge
MITSUBISHI PENCIL CO1 citations50
US11112892B2Sep 7, 2021
Stylus pen
MITSUBISHI PENCIL CO0 citations47
US10023756B2Jul 17, 2018
Solid drawing material
MITSUBISHI PENCIL CO0 citations43
US12358685B2Jul 15, 2025
Replacement lead case
MITSUBISHI PENCIL CO0 citations41
US7381004B2Jun 3, 2008
Gas pressurized writing instrument and writing instrument refill
MITSUBISHI PENCIL CO0 citations41